Drug interactions
Memantine-donepezil + Succinylcholine
Severity: Major
Memantine-donepezil and Succinylcholine: major interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Donepezil inhibits plasma cholinesterase to some degree, which can slow succinylcholine breakdown. This may prolong neuromuscular blockade and delay recovery of breathing after anesthesia.
What this interaction means in plain words
Memantine-donepezil and Succinylcholine can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Memantine-donepezil belongs to Central Nervous System; Succinylcholine belongs to Musculoskeletal.
Why it happens
Cholinesterase inhibition reduces hydrolysis of succinylcholine and adds cholinergic stimulation at the neuromuscular junction.
What to do
Inform the anesthesia team of donepezil use and monitor neuromuscular function closely. Be prepared for prolonged paralysis and ventilatory support, and consider a different blocker.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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Other interactions of Memantine-donepezil
- Dronedarone + Memantine-donepezil Contraindicated
- Memantine-donepezil + Thioridazine Contraindicated
- Amantadine + Memantine-donepezil Major
- Amiodarone + Memantine-donepezil Major
- Amisulpride + Memantine-donepezil Major
- Amitriptyline + Memantine-donepezil Major
Other interactions of Succinylcholine
Frequently asked questions
Can I take Memantine-donepezil with Succinylcholine?
MediHelp rates the interaction as major. Memantine-donepezil and Succinylcholine can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Donepezil inhibits plasma cholinesterase to some degree, which can slow succinylcholine breakdown. This may prolong neuromuscular blockade and delay recovery of breathing after anesthesia.
How serious is the interaction between Memantine-donepezil and Succinylcholine?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Inform the anesthesia team of donepezil use and monitor neuromuscular function closely. Be prepared for prolonged paralysis and ventilatory support, and consider a different blocker.
What other medicines interact with Memantine-donepezil?
MediHelp also lists interactions of Memantine-donepezil with, for example, Dronedarone, Thioridazine, Amantadine. The full list is on the Memantine-donepezil page.
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